Carbon steel and wood stair ,arc indoor stair

Model:AT-805 carbonsteel and wood stairThe size of the keel :ø121×5mm iron pipeand 100×100×4mm iron square pipeThe surface treatment of the Keel::under repeated antirust pickling, then goes through high temperature pre-painting, antirust and anti-corrosion process.Color of the keel:silversand,blacksandThe thickness of the broadstep:38mm Thailand rubber wood timber ,or as per customer’s requestColor of the broadstep:red, black nut-brown,sapell,or as per customer's requestHandrail:ø51(ø63)mm solid wood,or ø51(ø63)mm×1.5mm stainless pipe,ø51(ø63)mm pvcthe railing :ø12(ø10)mm stainless steel bar or aluminum bar